Design and experimental study of multi-angle two-dimensional fiber bragg grating strain rosette

In order to solve the dimension matching on fiber Bragg grating sensor, multi-angle two-dimensional fiber Bragg grating strain rosettes were designed and the strain theory equation under uniaxial tensile state was also forumlated. Moreover, the tensile tests on steel plate with fiber Bragg grating strain rosette and resistance strain rosette were comparatively conducted and the corresponding strain-load curves were plotted. The comparisons between theoretical and experimental analysis show that the linearity of multi-angle two-dimensional fiber Bragg grating strain rosette is excellent and the monitoring data is reliable. The designed multi-angle two-dimensional fiber Bragg grating strain rosette is able to effectively monitor the strain of the structures under complex stress states. ©, 2015, Northeastern University. All right reserved.